Apparatus for manufacturing concrete blocks.



A v PATENTED MAY 28, 1907.

' e. B. TYLER7 APPARATUS FOR MANUFACTURING GONGRETE BLOCKS.

APPLICATION I'ILBD AUG; 26, 1906.

us uonmsygrgns co., wnsmmzrom n. c

UNITED STATESBATENT OFFICE.

GEORGE B. TYLER, OF HASTINGS, NEBRASKA, ASSIGNOR OF ONE-HALF TO WILLIAMR. WATERS, OF HASTINGS, NEBRASKA.

Specification of Letters Patent.

Patented May 28, 1907.

Application filed August 25,1906. Serial No. 331,958-

.To all whom it may concern:

Be it known that I, GEORGE B. TYLER, a

' citizen of the United States, residing in Hast- 1ngs, county of Adams,and State of Nebraska, have invented a new and useful Improvement inApparatus for Manufacturing Concrete Blocks, of which the following is aspecification.

This invention relates to apparatus for the manufacture of concretestructures, and it is specially designed for use in constructing streetcurbing, walls, steps, and other concrete structures in place.

The principal object of the invention is to provide a simple,substantial, and easily manipulated apparatus by means of which concretestructures of various kinds may be molded in place and of any desiredconfiguration.

Further objects of the invention are to provide apparatus of thecharacter mentioned which is so constructed as to'prevent any warping ortwisting of the casing through the action of the moisture present in theconcrete and to prevent absorption of moisture from the concrete by thewalls of the apparatus.

In attaining the objects above stated, I preferably employ apparatus ofthe structure illustrated in the accompanying drawing and hereinafterdescribed in detail, though it is to be understood that variationstherein may be made within the scope of the appended claims withoutdeparting from the spirit of the invention.

Referring to the drawing by the reference characters marked thereon, 1and 2 represent the front and rear walls respectively of a casing ormold for the concrete. These walls consist chiefly of plank, whichcombines the required degree of stiffness with lightness,

.and at intervals vertical braces 3 are provided on the outer surface ofeach wall to prevent bending on longitudinal lines of flexure. Each wallis provided with a protective lining 4 on its inner surface, theselinings being preferably formed of sheet zinc which effectively resiststhe chemical action of the wet concrete, and, being entirely imperviousto water, prevents the absorption of moisture from the concrete by theplank entering into the construction of the casing walls 1 and 2.

Along the top and bottom, each of the casing walls is provided with aheavy binding or guard strip 5 of strap iron or steel, which is securedin place by nails or screws 6 placed at suitable intervals. Thesebinding strips not only protect the edges of the lining 4 and the plankof the side walls from wear, but they also impart great longitudinalstiffness to the side walls and entirely eliminate the possibility ofthe warping of the casing, which is inevitable in casings constructed inthe usual manner, and which soon becomes so pronounced as to render thefurther use of the casings impossible.

The front wall 1 is preferably set perfectly vertical and the rear wall2 slightly inclined, as shown. The relative positions of the two wallsmay, however, be varied by altering the dimensions of the end pieces 7whichcoiperate with the side wallsto form the entire casing for theconcrete. The casing members are secured in position by means of bolts 8extending transversely through the side walls at suitable points. Eachof the bolts 8 is threaded at one end to engage threaded apertures inone of the side walls of the mold and at the other end is preferablyprovided with an extension which is bent to the form of a crank whichmay be used for tightening or loosening the bolt, and between the crankand the shaftof the bolt a head is provided which serves as an abutmentor shoulder against which one of the side walls of the mold rests. Ipreferably make use 'of only two such bolts, one being placed adjacentto each end of the apparatus and extending through two of the verticalbraces 3 which are provided on the outer surface of the side walls.These braces 3 are provided with metallic plates 9 secured in place byscrews, as shown, and one of the plates 9 is provided with a threadedaperture for engagement with the threadedportion 10 of the clampingbolt. The aperture of the other plate is unthreaded so that the bolt maybe passed easily through it, and each bolt is provided with a crank 11perferably formed integral therewith to facilitate the tightening orloosening of the bolt.

In the use of the apparatus the side walls and end pieces are set inposition, as shown, and the bolts 8 are then inserted and tightenedsufficiently to clamp the side walls against the end pieces. Theconcrete is then introduced into the top of the chamber formed by thecasing and tamped firmly un- [0 shown.

til the entire space is filled. It is then aldrawal of the clampingbolts and the sepalowed to set, and, after the setting process hascontinued sufficiently long for the con crete to hold its formpermanently, the bolts 5 8 are loosened or removed and the casingsmembers are set in position for the molding of a second mass ofconcrete.

Ordinarily, the end pieces 7 will not be set between the bolts 8 butadjacent thereto, as If, however, it is desired to mold the concrete inlonger blocks, the end pieces may be placed nearer the extremities ofthe side walls of the casing, and in that event the bolts 8 will leaveholes through the concrete 15 when the casing is removed. These holesmay be subsequently filled if desired, or, as they do not weaken thestructure, they may be left unfilled in foundation work or curbing, inwhich the holes do not detract from the 2C appearance.

i preferably incline the rear wall of the apparatus as shown in thedrawing to facilitate the removal of the apparatus after the setting ofthe concrete. As will be readily 2 5 seen, the upward taper given to theconcrete rate removal of the two side walls entirely unnecessary. Itwill, of course, be understood that the side walls may be given anydesired configuration on their inner faces by suitably carving the innerfaces of the plank and forcing the metal lining into the depressions soproduced.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is: v

In apparatus for manufacturing concrete blocks, a casing comprisingwooden side walls provided on their longitudinal edges and corners withstiff binding strips adapted to prevent bending of said walls and havinon their inner faces linings of material inipervious to moisture whichare extended under said stiffening strips and secured in place thereby,end members disposed between said side Walls, and clamping devices forsecuring the side walls and end members in relation.

In testimony whereof, I have signed my name in the presence of twowitnesses.

GEORGE B. TYLER.

Witnesses W. P. l\lCOREARY, CALLY H. VVAHLQUIST

